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/*
* Copyright (c) International Business Machines Corp., 2006
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
* the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* Author: Artem B. Bityutskiy
*
* This test does a lot of I/O to volumes in parallel.
*/
#include <stdio.h>
#include <errno.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <pthread.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include "libubi.h"
#define TESTNAME "io_paral"
#include "common.h"
#define THREADS_NUM 3
#define ITERATIONS 10
static libubi_t libubi;
static struct ubi_dev_info dev_info;
const char *node;
static int iterations = ITERATIONS;
int total_bytes;
static long long memory_limit(void)
{
long long result = 0;
FILE *f;
f = fopen("/proc/meminfo", "r");
if (!f)
return 0;
fscanf(f, "%*s %lld", &result);
fclose(f);
return result * 1024 / 4;
}
/**
* the_thread - the testing thread.
*
* @ptr thread number
*/
static void * the_thread(void *ptr)
{
int fd, iter = iterations, vol_id = (int)ptr;
unsigned char *wbuf, *rbuf;
char vol_node[strlen(UBI_VOLUME_PATTERN) + 100];
wbuf = malloc(total_bytes);
rbuf = malloc(total_bytes);
if (!wbuf || !rbuf) {
failed("malloc");
goto free;
}
sprintf(vol_node, UBI_VOLUME_PATTERN, dev_info.dev_num, vol_id);
while (iter--) {
int i, ret, written = 0, rd = 0;
int bytes = (random() % (total_bytes - 1)) + 1;
fd = open(vol_node, O_RDWR);
if (fd == -1) {
failed("open");
err_msg("cannot open \"%s\"\n", node);
goto free;
}
for (i = 0; i < bytes; i++)
wbuf[i] = random() % 255;
memset(rbuf, '\0', bytes);
do {
ret = ubi_update_start(libubi, fd, bytes);
if (ret && errno != EBUSY) {
failed("ubi_update_start");
err_msg("vol_id %d", vol_id);
goto close;
}
} while (ret);
while (written < bytes) {
int to_write = random() % (bytes - written);
if (to_write == 0)
to_write = 1;
ret = write(fd, wbuf, to_write);
if (ret != to_write) {
failed("write");
err_msg("failed to write %d bytes at offset %d "
"of volume %d", to_write, written,
vol_id);
err_msg("update: %d bytes", bytes);
goto close;
}
written += to_write;
}
close(fd);
fd = open(vol_node, O_RDONLY);
if (fd == -1) {
failed("open");
err_msg("cannot open \"%s\"\n", node);
goto free;
}
/* read data back and check */
while (rd < bytes) {
int to_read = random() % (bytes - rd);
if (to_read == 0)
to_read = 1;
ret = read(fd, rbuf, to_read);
if (ret != to_read) {
failed("read");
err_msg("failed to read %d bytes at offset %d "
"of volume %d", to_read, rd, vol_id);
goto close;
}
rd += to_read;
}
close(fd);
}
free(wbuf);
free(rbuf);
return NULL;
close:
close(fd);
free:
free(wbuf);
free(rbuf);
return NULL;
}
int main(int argc, char * const argv[])
{
int i, ret;
pthread_t threads[THREADS_NUM];
struct ubi_mkvol_request req;
long long mem_limit;
if (initial_check(argc, argv))
return 1;
node = argv[1];
libubi = libubi_open(1);
if (libubi == NULL) {
failed("libubi_open");
return 1;
}
if (ubi_get_dev_info(libubi, node, &dev_info)) {
failed("ubi_get_dev_info");
goto close;
}
req.alignment = 1;
mem_limit = memory_limit();
if (mem_limit && mem_limit < dev_info.avail_bytes)
total_bytes = req.bytes =
(mem_limit / dev_info.leb_size / THREADS_NUM)
* dev_info.leb_size;
else
total_bytes = req.bytes =
((dev_info.avail_lebs - 3) / THREADS_NUM)
* dev_info.leb_size;
for (i = 0; i < THREADS_NUM; i++) {
char name[100];
req.vol_id = i;
sprintf(name, TESTNAME":%d", i);
req.name = name;
req.vol_type = (i & 1) ? UBI_STATIC_VOLUME : UBI_DYNAMIC_VOLUME;
if (ubi_mkvol(libubi, node, &req)) {
failed("ubi_mkvol");
goto remove;
}
}
/* Create one volume with static data to make WL work more */
req.vol_id = THREADS_NUM;
req.name = TESTNAME ":static";
req.vol_type = UBI_DYNAMIC_VOLUME;
req.bytes = 3*dev_info.leb_size;
if (ubi_mkvol(libubi, node, &req)) {
failed("ubi_mkvol");
goto remove;
}
for (i = 0; i < THREADS_NUM; i++) {
ret = pthread_create(&threads[i], NULL, &the_thread, (void*)i);
if (ret) {
failed("pthread_create");
goto remove;
}
}
for (i = 0; i < THREADS_NUM; i++)
pthread_join(threads[i], NULL);
for (i = 0; i <= THREADS_NUM; i++) {
if (ubi_rmvol(libubi, node, i)) {
failed("ubi_rmvol");
goto remove;
}
}
libubi_close(libubi);
return 0;
remove:
for (i = 0; i <= THREADS_NUM; i++)
ubi_rmvol(libubi, node, i);
close:
libubi_close(libubi);
return 1;
}
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